Knife lock



May s, 1923.

1,454,665 J. BoBEK KNIFE LOCK Filed Sept. 22 1921 Fis. 1

1.5 z2 VV@ atto: new

Patented May 8, 1923.

JOHN BOBEK, OF TREVORTON, PENNSYLVANIA.

KNIFE LOCK.

Application led September 22, 1921. Serial No. 502,347.

T 0 all whom t may concern:

Be it known that I, JOHN Bonini, a citizen of Czechoslovakia, residing at Trevorton, in the county of Northumberland and State of Pennsylvania, have invented certain new and useful Improvements in Knife Locks, of which the following is a specification.

The primary object of the invention is the provision of a safety lock for pocket knives and the like whereby the blade may be retained in its open position securely looked against accidental closing, the blade, however, being readily closed whenever desired by the operator.

A further object of the invention is the provision of a pocket knife having a locking attachment for the blade thereof readily operable when the blade is open and-out of the way when the blade is closed, the construction being simple and inexpensive to manufacture.

A still further object of the invention is to prevent the accidental closing of the blade of a pocket knife which sometimes occurs to the injury of the owner, the invention being readily positioned for locking the blade open when desired to use the knife and then readily released when the knife is to be closed.

With these general objects in view, the in vention consists of the novel combination and arrangement of parts hereinafter more fully described in connection with the accompanying drawing and in which like reference characters designate corresponding parts throughout the several views.

In the drawing,

Figure 1 is an elevational view of a knife provided with my invention and with parts broken away,

Figure 2 is a plan view of the back of the knife in its open position as shown in Figure 1,

Figure S is a central longitudinal sectional view of the knife with the blade closed,

Figure 4 is a plan view thereof taken from the front of the knife,

Figure 5 is an enlarged transverse sectional view through the blade taken substantially upon line V-V of Figure 1, and

Figure 6 is a perspective view of the elements of the locking member detached from the knife blade and disassembled.

Referring more in detail to the drawing,

the invention is illustrated in connection with a pocket knife having substantially the usual form of handle 10 with the blade 11 pivoted to the handle by means of a pin 12 for folding within space or chamber 13 provided in the handle 10 adapted for receiving the blade. The back spring` 14 of the handle is normally in abutment with the rear shoulder 15 of the blade 11 when the blade is open as illustrated in Figures 1 and 2 of the drawing.

A rectangular bore 16 is provided in the rear end of the blade 11 between the shoulder 15 and the point of pivotal movement 12, the said bore being adapted for the sliding reception of a rectangular bolt 17. A pin 18, rectangular in cross section is slidably positioned through a slot 19 in the rear edge of the blade 11 having screw threaded connection with the bolt 17 by means of a threaded reduced shank 2O upon the inner end of said pin.

lt will be seen that the bolt 17 may be slidably moved longitudinally of the bore 16 by means of the pin 18 when grasping or engaging the knurled knob 21 on the outer end of the pin 1S. ln this manner, the bolt 17 is positioned entirely within the bore 16 when desired to close the blade 11 as shown in Figures 3 and 4 ofthe drawing and is projected inwardly of the chamber 13 of the handle 10 when desired to lock the blade 11 in its open position as shown in Figures 1 and 2. The bolt 17 engages the spring 14rwhen in its locking position as shown in Figure 1 and this prevents the closing of the blade 11.

A leaf spring 22 having a squared opening 23 is mounted upon the pin 18 and bears upon the back of the blade 11 for the purpose of holding the bolt 17 against accidental sliding movement and whereby the bolt 17 is retained either projected or retracted against accidental movement until it is desired to manually shift the bolt by engaging the hand of the operator with the knob 21. The complete operation of the device will be apparent from this detailed description thereof, the serviceable operation of the knife being unaffected by the invention but rendered more safe by preventing the accidental closing of the blade during the cutting operation. While the form of the invention set forth is believed preferable, it will nevertheless be understood that changes may be made therein without departing from the Spirit and scope of the inlongitudinal slot in the back thereof comvention. munieating with said bore7 a squared pin lVhat is claimed as new is: slidable in said slot and carried by the bolt, In aknife comprising a handle having a knurled finger engaging' knob upon the l5 5 a blade pivotally Connected thereto, the said outer end of the pin and a position retainblade having a rectangular bore open at the ing spring upon the pin between said knob pivoted end of the blade, a rectangular bolt and the back of the blade when the device slidable in Said bore adapted for projectis assembled. ing into the handle When the blade is open n testimony7 whereof I affix my signature. 20 10 with the bolt positioned at the rearward limit of its movement, the blade having a JOHN BOBEK. 

